Dallas police are investigating a deadly shooting at a parking garage on the UT Southwestern Medical Center campus.

The shooting was reported in a parking structure in the 5300 block of Harry Hines Boulevard on Tuesday night. A witness heard at least three fired in Garage 2 at about 7:30 p.m., UT Southwestern spokesman Russell Rian said.

The female victim has not been identified and police have not said what relationship, if any, she had with UT Southwestern.

Rian said the parking garage is available to any visitors to the campus.

The parking garage is on county property, but Dallas police will investigate the shooting.

The campus was locked down and remained on lockdown as of 10 p.m.

Graduate students who parked nearby told NBC 5 that the school sent alerts by text message that warned of a possible homicide.

"So we all just got text messages at the same time saying don't go outside, there's been a possible homicide and they said which garage and we all scrambled to the Internet because we don't know what all the garages are numbered as," grad student Dorothy Cupka said.